@article{article70b92b1c,
title   = {Using Cepheids to determine the galactic abundance gradient: III. Firt results for the outer disc},
author = {Andrievsky, A M and Kovtyukh, V V and Luck, R E and Lépine, Jacques Raymond Daniel and Maciel, Walter Junqueira and Beletsky, Yu. V.},
year = {2002},
journal   = {Astronomy and Astrophysics}
}